The **GT1-2PS/S-R** is a specific electronic connector series produced by **Hirose Electric**. It is primarily designed for high-frequency coaxial signals, commonly used in automotive antenna systems and telematics. Below is a detailed breakdown of its electronic and mechanical specifications. --- ### 1. General Overview The GT1 series is a "shielded connector" system designed to maintain signal integrity in environments with high electromagnetic interference (EMI). | Feature | Specification | | :--- | :--- | | **Connector Type** | Coaxial / Shielded | | **Mounting Style** | Through-Hole / Cable termination (depending on variant) | | **Automotive Standard** | Compliant with automotive reliability standards | | **Termination Method** | Crimp / Solder | --- ### 2. Key Electronic Parts & Components The assembly typically consists of four main electronic components: 1. **Inner Terminal (Center Pin):** This carries the actual electrical signal. It is usually gold or tin-plated to ensure low resistance and prevent oxidation. 2. **Insulator:** A dielectric material (often PPS or PBT resin) that keeps the center pin isolated from the outer shell to maintain a consistent impedance (usually 50Ω). 3. **Outer Terminal (Shield/Ground):** This provides the grounding path and acts as a Faraday cage to protect the signal from EMI. 4. **Housing:** The plastic outer shell that provides the mechanical locking mechanism (clipping) and polarization to prevent incorrect insertion. --- ### 3. Technical Specifications The electrical performance is optimized for radio frequency (RF) transmissions: * **Frequency Range:** Typically supports up to 2.5 GHz or higher (optimized for GPS, TV, and Cell signals). * **Characteristic Impedance:** 50 Ohms ($\Omega$). * **Voltage Rating:** 30V AC / 42.4V DC. * **Current Rating:** 1.0 Amp per contact. * **Contact Resistance:** 30 m$\Omega$ Max (inner), 20 m$\Omega$ Max (outer). --- ### 4. Applications Because of its robust locking mechanism and shielding, the GT1-2PS series is found in: * **GPS Antennas:** Connecting the satellite antenna to the head unit. * **Telematics Control Units (TCU):** Handling cellular data. * **In-Car Entertainment:** Connecting digital radio (DAB) or TV tuners. * **ADAS Sensors:** Connecting cameras or radar modules that require high-speed data transfer. ---